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Update Nested Arrays in Conjunction with $[]The $[<identifier>] filtered positional operator, in conjunction with the $[] all positional operator, can be used to update nested arrays. The following updates the values that are greater than or equal to 8 in the nested grades. questions array if the associated grades.
Say I have a data structure something like this:
{
'name': 'test',
'anotherdoc': {
'something': 'someval',
'somenum': 1
}
}
Now, say I wanted to set something. Initially, I though it would be done like so:
collection.update({'_id': myid}, {$set: {'anotherdoc.something': 'somenewval'});
This, however, seems to be incorrect. It does put some data in there, but it does so in an odd manner. It would, in this case, end up like so:
[
{
'name': 'test',
'anotherdoc': {
'something': 'someval',
'somenum': 1
}
},
['anotherdoc.something', 'someval']
]
Of course, not what I was looking for.
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